Carding device for elastic non-woven fabric production and working method thereof

Abstract

The invention is suitable for the technical field of elastic non-woven fabric production, and provides a carding device for elastic non-woven fabric production and a working method thereof.The carding device comprises a feeding assembly, a carding assembly, a differential assembly, an upper needling assembly and a lower needling assembly, and the feeding assembly, the carding assembly, the differential assembly, the upper needling assembly and the lower needling assembly are sequentially arranged; the feeding assembly comprises a feeding box, a feeding port is formed in the side wall of the feeding box, the differential assembly comprises a first differential roller, a second differential roller is arranged below the first differential roller, the upper needling assembly comprises upper needling needles, the lower needling assembly comprises lower needling needles, and the upper needling needles and the lower needling needles are arranged in the feeding box. The first differential roller and the second differential roller are arranged to be matched with each other, when fiber webs pass through the middle position of the first differential roller and the second differential roller, the parallel fiber webs can be extruded by the first differential roller and the second differential roller, fibers are displaced and crossed in the extrusion process, and the 3D effect of the fiber webs is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of elastic nonwoven fabric production, and more specifically, to a carding device for elastic nonwoven fabric production and a working method thereof. Background Art

[0002] Stretch non-woven fabric is a new type of non-woven fabric product with good elasticity and breathability. It breaks the limitations of traditional elastic film materials that are not breathable and have low elasticity. It is widely used in many fields such as medical, clothing, and industrial fields.

[0003] At present, in the production process of stretch non-woven fabrics, the combing device is one of the key equipment. Its function is to comb the fibers into a uniform fiber web and provide the basic size for subsequent forming and reinforcement. However, due to the limitations of production equipment and production technology, the produced fiber web can only be stretched in one direction, and the shrinkage after stretching is poor, which limits the expansion of the application field of stretch fabrics. The staff made corresponding improvements based on the problems that occurred. After the fiber web is formed, a differential condensation roller is added to increase the spatial three-dimensional effect of the fiber web through the action of the condensation roller.

[0004] However, after the fiber web is processed by the differential condensation roller, it needs to enter the next stage for needling treatment, but the needling commonly used is only single-sided needling, and the needling method is single, that is, the gap between the needles is the same, then the position of the fiber web being needled is the same, and the pulling between the fibers in the fiber web is insufficient, that is, the elastic force between the fibers is insufficient; in addition, due to the single needling method, the direction of force on the fiber web is single, and the elastic force of the elastic fabric finally formed by the fiber web is insufficient. A combing device for the production of elastic non-woven fabrics and a working method thereof are now proposed to improve the existing problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a carding device for producing elastic nonwoven fabrics and a working method thereof.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a combing device for producing elastic non-woven fabrics, comprising a feeding component, a combing component, a differential component, an upper needling component and a lower needling component, wherein the feeding component, the combing component, the differential component, the upper needling component and the lower needling component are arranged in sequence.

[0007] The feed assembly comprises a feed box, and a feed port is provided on the side wall of the feed box.

[0008] The combing assembly comprises a combing box, a plurality of combing rollers are arranged inside the combing box, a first pressing roller is arranged on a side of the combing box away from the feeding assembly, and a second pressing roller is arranged below the first pressing roller.

[0009] The differential assembly includes a first differential roller, and a second differential roller is arranged below the first differential roller.

[0010] The upper needling assembly includes an upper needling.

[0011] The lower acupuncture assembly includes lower acupunctures, and the lower acupunctures are distributed alternately with the upper acupunctures.

[0012] The present invention is further configured as follows: a group of first motors are respectively arranged on one side of each group of combing rollers, the output end of the first motor is connected to the combing roller, and the first motor is installed on the side wall of the combing box.

[0013] The present invention is further configured as follows: two groups of mounting frames are symmetrically arranged on one side of the combing box away from the feeding assembly, a group of first slide rails are respectively arranged on the inner side walls of the two groups of mounting frames, a group of first sliding blocks are respectively arranged inside the two groups of mounting frames, a first cylinder is arranged on the top of the mounting frame, and the output end of the first cylinder is connected to the first sliding block.

[0014] By adopting the above technology, by setting the first pressing roller and the second pressing roller, multiple groups of fiber layers can be pressed together to form a fiber web. At the same time, the first pressing roller and the second pressing roller also increase the pulling between the fiber layers during the pressing process, thereby increasing the elasticity of the fiber web.

[0015] The present invention is further configured as follows: the differential assembly also includes a first base plate, two groups of first brackets are symmetrically arranged on the top of the first base plate, a group of first sliding grooves are respectively opened on the side walls of the two groups of first brackets, a group of second sliding blocks are respectively arranged inside the two groups of first sliding grooves, a group of second cylinders are respectively arranged above the two groups of second sliding blocks, and the output end of the second cylinder is connected to the top of the second sliding block.

[0016] The present invention is further configured as follows: a second motor is installed on one side of the second slider, the output end of the second motor is connected to the first differential roller, a third motor is arranged below the second motor, the output end of the third motor is connected to the second differential roller, and the shape of the first differential roller is adapted to the shape of the second differential roller.

[0017] By adopting the above technology, the size of the first differential roller is set to gradually decrease outward from the center position of the roller, and the size of the second differential roller is set to gradually expand outward from the center position of the roller. The shapes of the first differential roller and the second differential roller match each other, and the second motor and the third motor are started respectively. The second motor and the third motor respectively drive the first differential roller and the second differential roller to rotate at their respective speeds. At this time, the first differential roller and the second differential roller form a speed difference. The first differential roller and the second differential roller can effectively pull the fiber web to enhance the elastic force of the fiber web. When the fiber web passes through the middle position of the first differential roller and the second differential roller, the parallel fiber webs will be squeezed by the first differential roller and the second differential roller. The fibers will be displaced and crossed during the squeezing process, so that the fiber web forms a 3D stereoscopic effect.

[0018] The present invention is further configured as follows: the upper acupuncture assembly also includes a second bottom plate, two groups of second brackets are symmetrically arranged on the top of the second bottom plate, a group of second slide grooves are respectively opened on the side walls of the two groups of second brackets, and a group of third sliding blocks are respectively slidably connected inside the two groups of second slide grooves.

[0019] The present invention is further configured as follows: a group of third cylinders are respectively arranged above the two groups of the third sliders, the output end of the third cylinder is connected to the top of the third slider, a first needle plate is arranged in the middle position of the two groups of the third sliders, the two ends of the first needle plate are respectively connected to the two groups of the third sliders, the upper needling is arranged at the bottom of the first needle plate, and the upper needling is used to puncture the fiber web from above.

[0020] The present invention is further configured as follows: the lower acupuncture assembly also includes a third bottom plate, two groups of mounting seats are symmetrically arranged on the top of the third bottom plate, a group of placement grooves are respectively opened on the side walls of the two groups of mounting seats, a group of third brackets are respectively arranged on the top of the two groups of mounting seats, a connecting plate is arranged on the top of the third bracket, a group of third sliding grooves are respectively opened on the side walls of the two groups of third brackets, and a group of fourth sliding blocks are respectively slidably connected to the inside of the two groups of third sliding grooves.

[0021] The present invention is further configured as follows: a group of fourth cylinders are respectively arranged below the two groups of the fourth sliders, the fourth cylinders are arranged inside the placement groove, the output end of the fourth cylinder is connected to the fourth slider, a second needle plate is arranged in the middle position of the two groups of the fourth sliders, the two ends of the second needle plate are respectively connected to the two groups of the fourth sliders, the lower needling is arranged at the top of the second needle plate, and the lower needling is used to puncture the fiber web from the bottom.

[0022] By adopting the above technology, the upper needling is set to puncture the fiber web from top to bottom, and the lower needling is set to puncture the fiber web from bottom to top, thereby increasing the number of punctures of the fiber web. The upper needling and the lower needling penetrate the fiber web from different directions, so that the fibers are subjected to forces in both the upper and lower directions, thereby becoming entangled at multiple angles. Compared with the needling in a single direction, this multi-directional entanglement can make the connection between the fibers tighter and more stable. When the fiber web is stretched by external force, the fibers are not easy to slip against each other, thereby helping to improve the overall fiber web. The elastic recovery ability of the fiber web can better recover to its original shape after being stretched. In addition, the upper needling and the lower needling are staggered, that is, referring to the attached figure, the odd-numbered rows are upper needling, and the even-numbered rows are lower needling. The lower needling compensates for the gap in the middle of the upper needling, and the lower needling fills the gap in the upper needling, so that the structure of the fiber web in the thickness direction is denser. In this way, when subjected to external force, the fiber web can transfer stress more effectively, and will not cause stress concentration due to the existence of internal gaps, thereby improving the elasticity and deformation resistance of the fiber web.

[0023] A working method of a combing device for producing elastic nonwoven fabrics, using the combing device for producing elastic nonwoven fabrics as described above, comprises the following steps: S1. First, the fiber raw materials after opening treatment enter the feed box from the feed port, and the fiber raw materials entering the feed box are combed by several groups of combing rollers to form multiple groups of fiber layers. The multiple groups of fiber layers after forming are then pressed by the first pressing roller and the second pressing roller to form a synthetic fiber web.

[0024] S2. Secondly, the pressed fiber web is subjected to differential speed processing via a first differential speed roller and a second differential speed roller to enhance the elasticity of the fiber web.

[0025] S3. Then, after the fiber web is subjected to the differential speed treatment, it is subjected to the puncture of the upper needle and the lower needle in sequence to further enhance the elasticity of the fiber web.

[0026] S4. Finally, the fiber web is transported to the next processing step after being punctured by upper and lower needles, and is processed into a stretch nonwoven fabric through the next process.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: (1) By arranging the first differential roller and the second differential roller to cooperate with each other, when the fiber web passes through the middle position of the first differential roller and the second differential roller, the parallel fiber web will be squeezed by the first differential roller and the second differential roller, and the fibers will be displaced and crossed during the squeezing process, so that the fiber web forms a 3D stereoscopic effect.

[0028] (2) By setting up two groups of second cylinders, the two groups of second cylinders drive the two groups of second slide blocks to slide along the two groups of first slide grooves respectively, and the first differential roller can follow the movement of the second slide block, thereby realizing the adjustment of the gap between the first differential roller and the second differential roller, and meeting the demand for fiber web extrusion by adjusting the gap.

[0029] (3) By setting the upper and lower needles to pierce the fiber mesh from different directions, the fibers are subjected to forces in both the upper and lower directions, resulting in entanglement at multiple angles. This multi-directional entanglement can make the connection between the fibers tighter and more stable than single-direction needle piercing.

[0030] (4) By arranging the upper and lower needling to be staggered, the lower needling compensates for the gaps in the middle of the upper needling, making the structure of the fiber web denser in the thickness direction. In this way, when subjected to external force, the fiber web can transfer stress more effectively and will not cause stress concentration due to the existence of internal gaps, thereby improving the elasticity and deformation resistance of the fiber web. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention is a schematic structural diagram of a carding device for producing elastic nonwoven fabrics and a working method thereof.

[0032] Figure 2 For the present invention Figure 1 Isometric view of.

[0033] Figure 3 It is a structural schematic diagram of the combing component in the present invention.

[0034] Figure 4 It is a schematic diagram of the structure of the differential assembly in the present invention.

[0035] Figure 5 It is a schematic diagram of the matching structure of the first differential roller and the second differential roller in the present invention.

[0036] Figure 6 It is a schematic structural diagram of the upper acupuncture assembly in the present invention.

[0037] Figure 7 For the present invention Figure 6 Front view of .

[0038] Figure 8 It is a schematic structural diagram of the lower acupuncture assembly in the present invention.

[0039] Fig. 9 It is a schematic diagram of the distribution structure of upper acupuncture and lower acupuncture in the present invention.

[0040] Description of reference numerals: 1, feed assembly; 11, feed box; 12, feed port; 2. Combing assembly; 21. Combing box; 22. First motor; 23. Mounting frame; 24. Combing roller; 25. First cylinder; 26. First slide rail; 27. First slide block; 28. First pressure roller; 29. ​​Second pressure roller; 3. differential assembly; 31. first base plate; 32. first bracket; 33. second slider; 34. second motor; 35. third motor; 36. first differential roller; 37. second differential roller; 38. second cylinder; 4. Upper needling assembly; 41. Second bottom plate; 42. Third slide block; 43. Third cylinder; 44. First needle plate; 45. Upper needling; 46. Second bracket; 5. Lower acupuncture assembly; 51. Mounting seat; 52. Third bottom plate; 53. Third bracket; 54. Fourth slide block; 55. Second needle plate; 56. Lower acupuncture; 57. Connecting plate; 58. Fourth cylinder. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0043] See also Figure 1-9 , the present invention provides the following technical solutions: Embodiment 1, a carding device for producing elastic nonwoven fabrics, comprises a feeding assembly 1, the feeding assembly 1 is used to convey the fiber raw material after the opening treatment, and the specific structure of the feeding assembly 1 is as follows: See also Figure 1-Figure 3 The feeding component 1 includes a feeding box 11, and a feeding port 12 is opened on the side wall of the feeding box 11. The previous processing device of the feeding component 1 is an opening component. The fiber raw material is first opened by the opening component, and the opened fiber raw material enters the interior of the feeding box 11 through the feeding port 12. A conveying mechanism is arranged inside the feeding box 11, and the conveying mechanism is used to convey the fiber raw material to the position of the next process.

[0044] See also Figure 1 A combing assembly 2 is provided on one side of the feeding assembly 1. The combing assembly 2 is used for combing the fiber raw material. The specific structure of the combing assembly 2 is as follows: See also Figure 1-Figure 3 The combing assembly 2 includes a combing box 21 , and a plurality of combing rollers 24 are arranged inside the combing box 21 . A first pressing roller 28 is arranged on the side of the combing box 21 away from the feeding assembly 1 , and a second pressing roller 29 is arranged below the first pressing roller 28 .

[0045] See also Figure 1-Figure 3 A first motor 22 is disposed on one side of each combing roller 24 , and an output end of the first motor 22 is connected to the combing roller 24 . The first motor 22 is installed on the side wall of the combing box 21 .

[0046] See also Figure 1-Figure 3 Two groups of mounting frames 23 are symmetrically arranged on one side of the combing box 21 away from the feeding assembly 1, and a group of first slide rails 26 are respectively arranged on the inner side walls of the two groups of mounting frames 23. A group of first sliding blocks 27 are respectively arranged inside the two groups of mounting frames 23. A first cylinder 25 is arranged on the top of the mounting frame 23, and the output end of the first cylinder 25 is connected to the first sliding block 27.

[0047] The specific operation process of combing component 2 is as follows: A plurality of first motors 22 are started, and the first motors 22 drive the combing rollers 24 to move. The combing rollers 24 comb the fiber raw materials entering the combing box 21, and the fiber raw materials after the combing process form a plurality of fiber layers.

[0048] The two groups of first cylinders 25 are started synchronously, and the first cylinders 25 drive their corresponding first sliders 27 to slide upward along the first slide rails 26. At this time, the first pressing roller 28 moves with the first pressing roller 27, and the first pressing roller 28 moves away from the second pressing roller 29. The formed multiple groups of fiber layers pass through the middle position of the first pressing roller 28 and the second pressing roller 29.

[0049] The first cylinder 25 is started again, and the first cylinder 25 drives the first slider 27 to slide downward along the first slide rail 26. The first pressing roller 28 moves downward along with the first pressing roller 27. Under the dual action of the first pressing roller 28 and the second pressing roller 29, the multiple groups of fiber layers are pressed together. The multiple groups of fiber layers are pressed together by the first pressing roller 28 and the second pressing roller 29 to form a fiber web.

[0050] By providing the first pressing roller 28 and the second pressing roller 29, multiple groups of fiber layers can be pressed together to form a fiber web. Meanwhile, the first pressing roller 28 and the second pressing roller 29 also increase the pulling between the fiber layers during the pressing process, thereby increasing the elasticity of the fiber web.

[0051] In the second embodiment, the fiber raw material can be conveyed and combed by setting a feeding component 1 and a combing component 2. After being processed by a plurality of combing rollers 24, the fiber raw material can form a plurality of fiber layers. The plurality of fiber layers are further pressed together by a first pressing roller 28 and a second pressing roller 29 to form a fiber web. However, at this time, the fiber web is only pressed together by the first pressing roller 28 and the second pressing roller 29. In this case, the fiber web produced can only be stretched in one direction, and has poor retraction after stretching, which limits the expansion of the application field of the stretch fabric.

[0052] See also Figure 1To this end, a differential assembly 3 is provided on the side of the combing assembly 2 away from the feeding assembly 1, and the differential assembly 3 is used to effectively pull the fiber web and enhance the elasticity of the fiber web. The specific structure of the differential assembly 3 is as follows: See also Figure 4 and Figure 5 The differential assembly 3 includes a first differential roller 36 , and a second differential roller 37 is disposed below the first differential roller 36 .

[0053] See also Figure 4 and Figure 5 The differential assembly 3 also includes a first base plate 31, two groups of first brackets 32 are symmetrically arranged on the top of the first base plate 31, a group of first sliding grooves are respectively opened on the side walls of the two groups of first brackets 32, a group of second sliding blocks 33 are respectively arranged inside the two groups of first sliding grooves, and a group of second cylinders 38 are respectively arranged above the two groups of second sliding blocks 33, and the output end of the second cylinder 38 is connected to the top of the second sliding block 33.

[0054] See also Figure 4 and Figure 5 A second motor 34 is installed on one side of the second slider 33, and the output end of the second motor 34 is connected to the first differential roller 36. A third motor 35 is arranged below the second motor 34, and the output end of the third motor 35 is connected to the second differential roller 37. The shape of the first differential roller 36 is adapted to the shape of the second differential roller 37.

[0055] Among them, the size of the first differential roller 36 is set to gradually decrease outward from the center position of the roller, and the size of the second differential roller 37 is set to gradually expand outward from the center position of the roller. The shapes of the first differential roller 36 and the second differential roller 37 are matched. When the fiber web passes through the middle position of the first differential roller 36 and the second differential roller 37, the parallel fiber webs will be squeezed by the first differential roller 36 and the second differential roller 37. The fibers will be displaced and crossed during the squeezing process, so that the fiber web forms a 3D stereoscopic effect.

[0056] In addition, the second motor 34 and the third motor 35 are started respectively, and the second motor 34 and the third motor 35 respectively drive the first differential roller 36 and the second differential roller 37 to rotate at their respective speeds. At this time, the first differential roller 36 and the second differential roller 37 form a speed difference, and the first differential roller 36 and the second differential roller 37 can effectively pull the fiber web to enhance the elastic force of the fiber web.

[0057] By arranging the first differential roller 36 and the second differential roller 37 to cooperate with each other, the fiber web can be squeezed to meet the demand for increasing the elastic force of the fiber web.

[0058] By setting up two groups of second cylinders 38, the two groups of second cylinders 38 drive the two groups of second sliders 33 to slide along the two groups of first slide grooves respectively, and the first differential roller 36 can follow the movement of the second slider 33, thereby realizing the adjustment of the gap between the first differential roller 36 and the second differential roller 37, and meeting the demand for fiber web extrusion by adjusting the gap.

[0059] In the third embodiment, the fiber web needs to enter the needling treatment device after being processed by the differential assembly 3, but the needling usually used is only single-sided needling, and the needling method is single, that is, the gap between the needles is the same, then the positions of the fiber web being needled are the same, and the pulling between the fibers in the fiber web is not enough, that is, the elastic force between the fibers is not enough; in addition, due to the single needling method, the direction of force on the fiber web is single, and the elastic force of the elastic fabric finally formed by the fiber web is insufficient.

[0060] See also Figure 1 To this end, an upper needling assembly 4 is arranged on the side of the differential assembly 3 away from the combing assembly 2, and a lower needling assembly 5 is arranged on the side of the upper needling assembly 4 away from the differential assembly 3. The needling device is divided into an upper needling assembly 4 and a lower needling assembly 5, and the puncture of the upper needling assembly 4 and the lower needling assembly 5 is used to increase the gaps in the fiber web and pre-entangle the fibers on all four sides, thereby producing a four-sided high-elastic non-woven fabric.

[0061] The specific structure of the upper acupuncture assembly 4 is as follows: The upper needling assembly 4 includes an upper needling 45 .

[0062] See also Figure 6 and Figure 7 The upper acupuncture assembly 4 also includes a second bottom plate 41, and two groups of second brackets 46 are symmetrically arranged on the top of the second bottom plate 41. A group of second slide grooves are respectively opened on the side walls of the two groups of second brackets 46, and a group of third sliders 42 are slidably connected inside the two groups of second slide grooves.

[0063] See also Figure 6 and Figure 7 A group of third cylinders 43 are respectively arranged above the two groups of third sliders 42, and the output end of the third cylinder 43 is connected to the top of the third slider 42. A first needle plate 44 is arranged in the middle position of the two groups of third sliders 42, and the two ends of the first needle plate 44 are respectively connected to the two groups of third sliders 42. An upper needle plate 45 is arranged at the bottom of the first needle plate 44, and the upper needle plate 45 is used to puncture the fiber web from above.

[0064] The specific operation process of the upper acupuncture assembly 4 is as follows: The two groups of third cylinders 43 are started, and the two groups of third cylinders 43 drive the two groups of third slide blocks 42 to move downward along the two groups of second slide grooves. At this time, the first needle plate 44 moves downward following the two groups of third slide blocks 42, and the several upper needles 45 at the bottom of the first needle plate 44 pierce the fiber web during the downward movement, further enhancing the elasticity of the fiber web.

[0065] The specific structure of the lower acupuncture assembly 5 is as follows: See also Figure 6-Figure 9 The lower acupuncture assembly 5 includes lower acupuncture points 56 , and the lower acupuncture points 56 and the upper acupuncture points 45 are distributed alternately.

[0066] See also Figure 6-Figure 9 The lower acupuncture assembly 5 also includes a third bottom plate 52, two groups of mounting seats 51 are symmetrically arranged on the top of the third bottom plate 52, a group of placement grooves are respectively opened on the side walls of the two groups of mounting seats 51, a group of third brackets 53 are respectively arranged on the top of the two groups of mounting seats 51, a connecting plate 57 is arranged on the top of the third bracket 53, a group of third sliding grooves are respectively opened on the side walls of the two groups of third brackets 53, and a group of fourth sliding blocks 54 are respectively slidably connected inside the two groups of third sliding grooves.

[0067] See also Figure 6-Figure 9 A group of fourth cylinders 58 are respectively arranged under the two groups of fourth sliders 54, and the fourth cylinders 58 are arranged inside the placement groove. The output end of the fourth cylinder 58 is connected to the fourth slider 54. A second needle plate 55 is arranged in the middle position of the two groups of fourth sliders 54, and the two ends of the second needle plate 55 are respectively connected to the two groups of fourth sliders 54. The lower needling 56 is arranged on the top of the second needle plate 55, and the lower needling 56 is used to puncture the fiber web from the bottom.

[0068] The specific operation process of the lower acupuncture assembly 5 is as follows: The fiber web punctured by the upper needling 45 is transported to the top of the lower needling 56, and the two groups of fourth cylinders 58 are started. The two groups of fourth cylinders 58 drive the two groups of fourth slide blocks 54 to move upward along the two groups of third slide grooves. At this time, the second needle plate 55 moves upward with the two groups of fourth slide blocks 54, and several lower needlings 56 on the top of the second needle plate 55 penetrate the fiber web during the upward movement, thereby further enhancing the elasticity of the fiber web.

[0069] By providing the upper needling 45 to puncture the fiber web from top to bottom and the lower needling 56 to puncture the fiber web from bottom to top, the number of punctures of the fiber web is increased. The upper needling 45 and the lower needling 56 penetrate the fiber web from different directions, so that the fibers are subjected to forces in both upper and lower directions, thereby becoming entangled at multiple angles. Compared with the needling in a single direction, this multi-directional entanglement can make the connection between the fibers tighter and more stable. When the fiber web is stretched by external force, the fibers are not easy to slip against each other, which helps to improve the overall elastic recovery ability of the fiber web and enable the fiber web to better recover to its original shape after being stretched.

[0070] In addition, the upper acupuncture 45 and the lower acupuncture 56 are arranged in a staggered manner, that is, see Fig. 9 The odd-numbered rows are upper needling 45, and the even-numbered rows are lower needling 56. The lower needling 56 compensates for the gap in the middle of the upper needling 45. The operation of lower needling 56 filling the gap in the upper needling 45 makes the structure of the fiber web denser in the thickness direction. In this way, when subjected to external force, the fiber web can transfer stress more effectively, and will not cause stress concentration due to the existence of internal gaps, thereby improving the elasticity and deformation resistance of the fiber web.

[0071] A next processing device is arranged on the side of the lower needling assembly 5 away from the upper needling assembly 4. The conveying mechanism in the processing device transports the punctured fiber web to the processing position. The processing device processes the fiber web to finally generate elastic nonwoven fabric.

[0072] Embodiment 4, a working method of a combing device for producing elastic nonwoven fabric, using the above-mentioned combing device for producing elastic nonwoven fabric, comprises the following steps: S1. First, the fiber raw material after opening treatment enters the feed box 11 from the feed port 12, and the fiber raw material entering the feed box 11 is combed by several groups of combing rollers 24 to form multiple groups of fiber layers. The multiple groups of fiber layers after forming are then pressed into a fiber web by the first pressing roller 28 and the second pressing roller 29.

[0073] S11. First, the fiber raw material is opened by a fiber opening device. The fiber raw material after opening enters the feed box 11 through the feed port 12. The conveying mechanism inside the feed box 11 conveys the fiber raw material to the combing box 21.

[0074] S12, starting a plurality of first motors 22, the first motors 22 drive the combing rollers 24 to move, the combing rollers 24 comb the fiber raw materials entering the combing box 21, and the fiber raw materials after the combing process form a plurality of fiber layers.

[0075] S13, the two groups of first cylinders 25 are started synchronously, and the first cylinders 25 drive the corresponding first sliders 27 to slide upward along the first slide rails 26. At this time, the first pressing roller 28 moves with the first pressing roller 27, and the first pressing roller 28 moves away from the second pressing roller 29. The formed multiple groups of fiber layers pass through the middle position of the first pressing roller 28 and the second pressing roller 29.

[0076] S14, start the first cylinder 25 again, the first cylinder 25 drives the first slider 27 to slide downward along the first slide rail 26, and the first pressing roller 28 moves downward along the first pressing roller 27, and the multiple groups of fiber layers are pressed under the dual action of the first pressing roller 28 and the second pressing roller 29. The multiple groups of fiber layers are pressed by the first pressing roller 28 and the second pressing roller 29 to form a fiber web.

[0077] S2. Next, the pressed fiber web is subjected to differential speed processing via the first differential speed roller 36 and the second differential speed roller 37 to enhance the elasticity of the fiber web.

[0078] S21. Secondly, start the second motor 34 and the third motor 35 respectively. The second motor 34 and the third motor 35 respectively drive the first differential roller 36 and the second differential roller 37 to rotate at their respective speeds. At this time, the first differential roller 36 and the second differential roller 37 form a speed difference. The first differential roller 36 and the second differential roller 37 can effectively pull the fiber web to enhance the elastic force of the fiber web.

[0079] S3. Then, after the fiber web is subjected to the differential speed treatment, it is sequentially punctured by the upper needling 45 and the lower needling 56 to further enhance the elasticity of the fiber web.

[0080] S31. Then, start the two groups of third cylinders 43, which drive the two groups of third slide blocks 42 to move downward along the two groups of second slide grooves. At this time, the first needle plate 44 moves downward following the two groups of third slide blocks 42, and the several upper needles 45 at the bottom of the first needle plate 44 pierce the fiber web during the downward movement, further enhancing the elasticity of the fiber web.

[0081] S32, the fiber web punctured by the upper needling 45 is transported to the top of the lower needling 56, and the two groups of fourth cylinders 58 are started. The two groups of fourth cylinders 58 drive the two groups of fourth slide blocks 54 to move upward along the two groups of third slide grooves. At this time, the second needle plate 55 moves upward with the two groups of fourth slide blocks 54, and several lower needlings 56 on the top of the second needle plate 55 penetrate the fiber web during the upward movement, thereby further enhancing the elasticity of the fiber web.

[0082] S4. Finally, the fiber web is punctured by the upper needling 45 and the lower needling 56 and then transported to the next processing step, and is processed into a stretch nonwoven fabric through the next processing step.

[0083] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A carding device for producing elastic nonwoven fabrics, characterized in that: It comprises a feeding assembly (1), a combing assembly (2), a differential assembly (3), an upper needling assembly (4) and a lower needling assembly (5), wherein the feeding assembly (1), the combing assembly (2), the differential assembly (3), the upper needling assembly (4) and the lower needling assembly (5) are arranged in sequence; The feed assembly (1) comprises a feed box (11), and a feed port (12) is provided on a side wall of the feed box (11); The combing assembly (2) comprises a combing box (21), a plurality of groups of combing rollers (24) are arranged inside the combing box (21), a first pressing roller (28) is arranged on a side of the combing box (21) away from the feeding assembly (1), and a second pressing roller (29) is arranged below the first pressing roller (28); The differential assembly (3) comprises a first differential roller (36), and a second differential roller (37) is arranged below the first differential roller (36); The upper needling assembly (4) comprises an upper needling (45); The lower acupuncture assembly (5) comprises lower acupuncture points (56), and the lower acupuncture points (56) and the upper acupuncture points (45) are distributed in an alternating manner.

2. A carding device for producing elastic nonwoven fabric according to claim 1, characterized in that: A group of first motors (22) is respectively arranged on one side of each group of combing rollers (24); the output end of the first motor (22) is connected to the combing rollers (24); and the first motor (22) is mounted on the side wall of the combing box (21).

3. A carding device for producing elastic nonwoven fabric according to claim 2, characterized in that: Two groups of mounting frames (23) are symmetrically arranged on one side of the combing box (21) away from the feeding assembly (1); a group of first slide rails (26) are respectively arranged on the inner side walls of the two groups of mounting frames (23); a group of first slide blocks (27) are respectively arranged inside the two groups of mounting frames (23); a first cylinder (25) is arranged on the top of the mounting frame (23); and an output end of the first cylinder (25) is connected to the first slide block (27).

4. A carding device for producing elastic nonwoven fabric according to claim 1, characterized in that: The differential assembly (3) further comprises a first base plate (31), two groups of first brackets (32) are symmetrically arranged on the top of the first base plate (31), a group of first slide grooves are respectively opened on the side walls of the two groups of first brackets (32), a group of second sliders (33) are respectively arranged inside the two groups of first slide grooves, a group of second cylinders (38) are respectively arranged above the two groups of second sliders (33), and the output end of the second cylinder (38) is connected to the top of the second slider (33).

5. A carding device for producing elastic nonwoven fabric according to claim 4, characterized in that: A second motor (34) is mounted on one side of the second slider (33); an output end of the second motor (34) is connected to a first differential roller (36); a third motor (35) is arranged below the second motor (34); an output end of the third motor (35) is connected to a second differential roller (37); and a shape of the first differential roller (36) matches a shape of the second differential roller (37).

6. A carding device for producing elastic nonwoven fabric according to claim 1, characterized in that: The upper acupuncture assembly (4) further comprises a second bottom plate (41), two groups of second brackets (46) are symmetrically arranged on the top of the second bottom plate (41), a group of second slide grooves are respectively opened on the side walls of the two groups of second brackets (46), and a group of third sliding blocks (42) are respectively slidably connected inside the two groups of second slide grooves.

7. A carding device for producing elastic nonwoven fabric according to claim 6, characterized in that: A group of third cylinders (43) is respectively arranged above the two groups of third sliders (42), and the output end of the third cylinder (43) is connected to the top of the third slider (42). A first needle plate (44) is arranged in the middle of the two groups of third sliders (42), and the two ends of the first needle plate (44) are respectively connected to the two groups of third sliders (42). The upper needle plate (45) is arranged at the bottom of the first needle plate (44), and the upper needle plate (45) is used to puncture the fiber web from above.

8. A carding device for producing elastic nonwoven fabric according to claim 1, characterized in that: The lower acupuncture assembly (5) further comprises a third bottom plate (52), two groups of mounting seats (51) are symmetrically arranged on the top of the third bottom plate (52), a group of placement grooves are respectively provided on the side walls of the two groups of mounting seats (51), a group of third brackets (53) are respectively provided on the top of the two groups of mounting seats (51), a connecting plate (57) is provided on the top of the third bracket (53), a group of third sliding grooves are respectively provided on the side walls of the two groups of third brackets (53), and a group of fourth sliding blocks (54) are respectively slidably connected inside the two groups of third sliding grooves.

9. A carding device for producing elastic nonwoven fabric according to claim 8, characterized in that: A group of fourth cylinders (58) is respectively arranged below the two groups of fourth sliders (54), the fourth cylinders (58) are arranged inside the placement groove, and the output end of the fourth cylinder (58) is connected to the fourth slider (54). A second needle plate (55) is arranged in the middle position of the two groups of fourth sliders (54), and the two ends of the second needle plate (55) are respectively connected to the two groups of fourth sliders (54). The lower needle plate (56) is arranged on the top of the second needle plate (55), and the lower needle plate (56) is used to puncture the fiber web from the bottom.

10. A method for operating a carding device for producing elastic nonwoven fabrics, using a carding device for producing elastic nonwoven fabrics as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. First, the fiber raw material after opening treatment enters the feed box (11) through the feed port (12), and the fiber raw material entering the feed box (11) is combed by a plurality of groups of combing rollers (24) to form a plurality of groups of fiber layers. The formed plurality of groups of fiber layers are then pressed by a first pressing roller (28) and a second pressing roller (29) to form a fiber web; S2, secondly, the pressed fiber web is subjected to differential speed processing via a first differential speed roller (36) and a second differential speed roller (37) to enhance the elasticity of the fiber web; S3, after the fiber web is subjected to differential speed treatment, it is punctured by upper acupuncture (45) and lower acupuncture (56) in sequence to further enhance the elasticity of the fiber web; S4. Finally, the fiber web is transported to the next processing step after being punctured by the upper needling (45) and the lower needling (56), and is processed into a stretch nonwoven fabric through the next processing step.

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